=== Amstrad's implementation of CPM 2.2 ===
CP/M 2.2 was distributed with the DDI-1 disc interface, the CPC464, and on side 1 of the CPC6128 system discs. It provided 43K TPA.
* Amstrad CPM2.2 uses Amstrad's "System" format. This is 40 tracks, 1 side, 9 sectors per track numbered &41-&49. There are two reserved tracks, then the directory which has 64 entries, and then the data area.